diff --git a/package.json b/package.json
index fdcbc8e..93af709 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "babel-preset-stage-0": "6.24.1",
     "babel-polyfill": "6.26.0",
     "debug": "3.1.0",
-    "mocha": "3.5.3"
+    "mocha": "5.1.1"
   },
   "dependencies": {
     "class-nonew-decorator": "^1.0.6"